I had no idea women were so shy. Closing themselves up in a stall for a quick pee. But if you say so then I’ll take your word for it.
I rarely if ever shut the stall door to pee. If the urinals are busy then I just step inside the stall and aim for the toilet. Closing the stall door doesn’t even occur to me. I do the same thing at home. I only close the stall door to take a dump. A closed stall door is actually a warning in a bathroom. 
Danger Will Robinson! The air in that room will soon be unbreathable. Get out while you can. lol
My comments about changing clothes or cleaning off a stain were obviously referencing bathrooms at work. I’m in there three or four times a day. They are an extension of my work space. Changing clothes for a basketball game at lunch. Or a short run. Bring a newspaper in there when taking a dump. Its a safe and comfortable environment. It is used occasionally by the public but usually its employees.
Toilets at airports or retail businesses are a different experience. I wouldn’t expect to see people changing clothes.